Pressure-regulating device



May 20., 1930. H. G.. RITCHIE 1,759,064 l PRES\SURE REGULATING DEVICE Filed March 14, 192'?A 2 sheets-sheet 1 l Y [NVE/WOR A/j. Y BY 17 Harold G. Rjrchie May 20, 1930. H". G. RlTcHlE 1,759,064

PRESSURE REGULATING DEVQICE Filedxarch 14, 1927 2 sheets-Sheet 2 /N VENTOR Harold '6. Rchie .ATTORNEYS Patented-May V20, 1930 HAROLD e. erfenis,

or BATTLE Carinzia MICHIGAN, Assreivon fro Gavin armonia & SONS, INC., OF vBAWILEI CREEK', MICHIGAN PBESSURE-REGULATING DEVICE Application 'filed March 14, 1927. Seriallo. 175,396.

The main objects of this invention are:

First, to provide an improved pressure regulating device for tire fillers and the like which is very accurate and may -be quickly adjusted to the desired pressure.

Second, to provide a pressure controlled valve which does not require a packing.

Third, to provide a device having these advantages which is simple and economical in structure and not Objects pertaining to details and economies of in invention willdefnitely appear fromV the escription to follow. The` invention is defined in the claims.v

' A structure which isa preferred` embodiment of my invention is clearly illustrated in the accompanying drawings forming a part of this application, in which:

y Fig. 1 is a front elevation of an air tower embodying the features of my invention.v

Fig. 2- isa detail view mainly in vertical section on a of Figs. 1, 3 and 4.

Fig. 3 is a fragmentary view showing the arrangement of the valve and its operating means within the air chamber or casing.

Fig. et is a diagrammatic view of the control means and its connections to the electromagnetan enlarged detail partially in Fig. 5 is section showing the arrangement of the valve and the operating connection of the armature of the electromagnet thereto.

Referring to the drawing, 1 represents the pedestal of an air tower, 2 the pivotedarm thereof and 3 the tire valve air chuck. These parts are shown conventionally and their details form no part of my invention.

In the embodiment illustrated I provide a housing 4 which is introduced into `the pedestal or column 1 asa 'section or element thereof. This housing is open at lone side and provided with a glass panel or -window 5 which is secured in position by the flanged ring 6 fitting upon the housing. The housing is internaly shouldered at 7 to support'the dial 8, the spacing members 9 arranged between the dial and the window 5 constituting nuts for the retaining `screws 10. This likely to `get out of repair.

line corresponding to line 2--2 the valve.

dial is lgraduated and provided with a pressure indicia as shown in Fig. 1.

vWithin the` housing I mount an. air chamberdesignated generally by the numeral 11 and which, in the embodimentillustrated, comprises a rear` section 12 secured to the rear wall'of the housingby the screws 13, and a front. section14 whichis secured to the rear section by the bolts 15. This housing is provided with an outlet pipe 16 to which lthe air chuck 3 is connected.

The air supply connection 17- is connected to the ai-r chamber as shown in Fig. 5, a. needle valve 18 controlling this inlet connection. This needle valve seats outwardly against. the pressure lis held yieldingly upon its seat by meansof lthe coiled spring 19'which is'connected toI the armature 2() of an electromagnet 21. This armature is -pivoted at 22 inthe conduit 'A17 and and is provided with an arm 23 engaging the valve, the arm carrying an adjustable screw. 24 engaging The electromagnet, its armature and thevalv'e are all arranged within the air chamber 11. This avoids the necessity of any packing for the valve.

. 1' A Bourdon tube 25 is-mounted on the proj ecting pipe 26 bywhich it is connected to the air chamber. This Bourdon tube is grounded in the air chamber walls through this connection. The Bourdon tube carries a contact 27 which is preferably threaded through the end of the tube to coact with the cam-shaped switch or control member 28. v

' This member 28 is mounted upon aspindle 29 provided with a finger piece 30v at its outer end so that it may be manually adjusted. Thisspindle carries an index finger 31 which is operatively associated with the dial 8, the cam andthe index finger being properly positioned relative to eachother so that the cani may be properly adjusted yv-ice to the required provided for the in ex finger so that it is stopped when returned to zero. Thel cam has a recess turned to zero the contact is broken. VHowever, when moved from this zero position the contact 27 en ages the cam and remains in engagement t ereby closing the Switch and ressure.` A stop 32 is i 33 at the zero point so that when rel opening the valve until the pressure acting through the Bourdon tube member 25 breaks the Vcontact and thereby opens the switch, allowing the valve to close.

The spindle is insulated from the housing and the air chamber as indicated, an electrical connection` however, being provided in the form ot a disk 35 mounted on the spindle and the brush 3G mounted on the air chamber wall but insulated therefrom. This brush is connected to the electromagnet through the connection 37.

The power circuit indicated at 38has one wire connected to the electromagnet 39 and the other grounded in the air chamber wall as indicated at 40. The connection to the Bourdon tube switch member 25 is through this ground connection as shown in Fig. i..

In the operation of the device the finger piece 30 is manipulated to turn the pointer 3l to the indicia indicating the pressure desired. rl`his rotates the control member 28 relative to the contact 27 bringing the control member intou engagement with this contact member and thereby closing the circuit. L The air chuck 3 is then applied to the tire to be inflated. As soon as the required pressure has been reached the expansion of the Bourdon tube lifts the contact 27 from the .control member 28, thereby breaking the circuit and closing the valve. l

My improvedV pressure regulator is especially well adapted and designed by me forv use in tire fillers, automatically closing the valve when a predetermined lpressure is reached.l It may be quickly adjusted to desired pressures and it is not necessary to revturn the index to zero after the devicehas been used, the valve automatically being closed when the presure in the line at the rear of the valve reaches a predetermined point.

By placing the valve land its operating parts within the air chamber I avoid the necessity of a packing. for the valve. i

I/Vhile in the embodiment illustrated the inner end of the spindle is supported on the air chamber, I desire to point out that this is merely a matter of structural convenience.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is l. In a pressure regulating device, the col-n- '.bination of a housing, a dial therein provided with pressure indicating indicia, an air chamber within said housing provided with air inlet and outlet connectons, a needle valve for the air inlet connection disposed within said air chamberA and seating outwardly against the inlet pressure, an electromagnet Within said air chamber, a coacting armature pivotally mounted Within saidair chamber and provided with a return spring, said ar1nature having an ,arm engaging said inlet valve whereby t-hevalve is .h-eld yieldingly against its seat, a spindle provided with a iinger piece v within said chamber and and Awith an index inger operatively associated with said dial, a cani-shaped control member arranged on said spindle in relation corresponding to the said index; ingei, a Bourdon tube connected to said air chainber and a ranged within said housing to embrace said control member, and a contact threaded vfor adjustment on said Bourdon tube coa cting with said control iii-einher, said control member and Bourdon tube being electrically connected to and constituting a control switch for said electroniagnet.

2. In a pressure regulating device, the coinbination of a housing, a diai therein provided with. pressure indicating indicia, an airchamber within said housing provided with air inlet and outlet connections, valve for the air inlet connection. disposed within said air chamber, an elect-romagnet within said air chamber, a coactine armature pivotally mounted within said air Vchamber and provided with a.- return spring, said armature en# gaging said inlet valve wherebj,T the valve is held yieldingly against its seat, a spindle provided ivith a finger piece and with an index finger operatively associated with said dial, a cam-shaped cont-roi member arranged on said spindle in relation corresponding to the said index finger, a Bourdontube connectedA to said air chamber and arranged within said housing to embrace said control member, and

a contact on said Bourdon tube coacting with said control member, said control member and Bourdon tube being electricaily connected to l and constituting a control switch for said electromaguet.

3. In a device of the class described, the combination of an air chamber provided with air inlet and outlet connections, a needle valve for the .said air inlet connection disposed seating outwardly against the inlet pressure, an electromagnet within said air chamber, a coacting armature disposed within said air tively connected to said valve, a spring acting to return said armature and yieldingly hold said valve on its seat, a Bourdon tube connected to said air chamber and provided with an adjustable Contact, a cam-shaped control member'operatively associated with saidV contact of said'Bourdon tube, said Bourdon tubeand control member being electrically connected to said electromagnet constituting a control switch therefor, a dial provided with pressure indicating indicia, and means for manually adjusting said control member provided with an index operatively associated with said dial. g

4. In a device of the class described, the combination of an air chamber, a valve disposed Within said chamber, an electromagnet within said air chamber, a coacting armature disposed Within said air chamber and operatively connected to said valve, a Bourdon tube connected to said air chamber and provided chamber and opera- Y with a contact, a. cam-shaped control member operatively associated with said Contact of said Bourdon tube, said Bourdon tube and control member being electrically connected to said electromagnet constituting a control atively connected to said valve, a spring acting to return said armature and yieldingly hold said valve on its seat, a Bourdon tube connected to said air chamber and provided with an adjustable contact, a cam-shaped control member operativelyassociatedA with said contact of said Bourdon tube, said Bourdon tube and control member being electrically connected to said electromagnet constituting a control switch therefor, and means for manually adjusting said control member.

6.111 a device vof the class described, the combination of an air chamber, a valve dis- A posed within said chamber, an electromagnet within said air chamber, a coacting armature disposed within said air chamber and operatively connected to said valve, a Bourdon tube connectedto said air chamber and provided with a contact, a cam-shaped control member operatively associated with said contact of said Bourdon tube, said Bourdon tube and control member being electrically connected to said electromagnet constituting a control switch therefor, and means for manually adjusting said control member.

7. In a device of the class described, the combination of a housing, a dial therein provided With a ressure indicating indicia, an air chamber sed within the housing, a valve for said air chamber arranged therein, an electro-magnet and coacting armature arranged within said air chamber, said armature being operatively connected to said valve, a Bourdon tube provided with a contact arranged within said housing and connected to said air chamber, a rotatable cam- 'j shaped control member arranged within said Bourdon tube to coact with its said contact, said Bourdon tube and control member being electrically connected to said electro-magnet and constituting a control switch therefor, and means for manually adjusting said control member from outside of sald `housing provided with an index finger operatively associated with. said dial.

8. In a device of the class described, the combination of a housing, an air chamber disposed within the' housing, a valve for said air chamber arr therein, an electromagnet and coactmg armature arranged within said air chamber, said armature being operatively connected to said valve, a Bourdon tube provided with a contact arranged within -said housin and connected vto said air chamber, arotatab e cam-shaped control member arran ed Within said Bourdon tube to coact vvit its said contact, said Bourdon tube and control member being electrically connected vto said electro-magnet and constituting a control sv'vitch therefor, and means for manuall adjusting said control member from outsi e of said housing.

h Iiwitness whereof I have hereunto set my HAROLD G. RITCHIE. 

